An electrical miniature motor
CA 2321710 A1 · Owner: Kirk Acoustics A/S · Inventors: Hansen, Kaj Borge
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An electric miniature motor having a stator of magnetic soft material and a permanent magnetic rotor. The stator has a low electrical conductivity at least in the direction of the rotor shaft to dampen eddy currents in the stator material caused by the rotation of the rotor. The magnetizable meterial of the stator is composed of ring-shaped elements with two sections having their respective diameters so that the elements may be joined co-axially to a tubular stator. This provides the same eddy current damping properties as with a stator composed of segments, but the stator is much cheaper. The coils are formed as flat coils on a flexible foil which are arranged along the internal …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 11, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 11, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 11, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.